A standing wave oscillator is described. The standing wave oscillator includes a transmission line, and an even number of gain stages. Each gain stage is connected to the transmission line, and each gain stage is located at a respective location along a length of the transmission line. The gain stages are configured to generate a standing wave oscillator signal along the length of the transmission line, when a supply voltage is applied to at least one end of the transmission line. The location of each gain stage is non-coincidental with an expected location of maximum amplitude of the standing wave oscillator signal.

Articles including oscillating units and methods for producing the same are disclosed. An example article includes one or more oscillator units, where each oscillator unit comprises: a micro strip transmission line extending from a first end to a second end. A first termination impedance is coupled to the first end and a second termination impedance is coupled to the second end. A first transistor is coupled between the first end and the midpoint; and a second transistor is coupled between the midpoint and the second end. The micro strip transmission line has a midpoint between the first end and the second end; and each oscillator unit generates a standing wave having a predetermined wavelength in the micro strip transmission line.

Present invention relate to a wideband signal source. The wideband signal source comprises a voltage controlled oscillator (VCO), a first buffer and a programmable frequency extender. The VCO outputs a signal with at least N:1 frequency tuning ratio, with N being an integer or a non-integer number larger than 1. The frequency extender receives the signal via the buffer to generate a final output, which has a wider frequency band than the signal. The buffer isolates the final output from interfering VCO for VCO operation stability. The frequency extender comprises at least a 1/N frequency divider, which matches the N:1 frequency tuning ratio of the signal, such that the final output has a gapless frequency band wider than the VCO output signal.

An integrated circuit transceiver device includes a plurality of functional circuits, and clock circuitry for distributing synchronous, in-phase, phase-locked clock signals to all transceiver circuits. The clock circuitry includes a frequency-controllable distributed oscillator including at least one coupled pair of transmission line oscillators having a respective oscillator core, and at least one respective transmission line segment. At least one impedance element couples the at least one respective transmission line segment of a first transmission line oscillator to the at least one respective transmission line segment of a second transmission line oscillator. Impedance of the impedance element is different from impedance of each respective transmission line segment to cause reflection at the at least one impedance element. At least one tap corresponding to each respective one of the transmission line oscillators outputs synchronous, in-phase, phase-locked clock signals for the functional circuits at points along the distributed oscillator.

A standing wave oscillator is described. The standing wave oscillator includes a transmission line, and an even number of gain stages. Each gain stage is connected to the transmission line, and each gain stage is located at a respective location along a length of the transmission line. The gain stages are configured to generate a standing wave oscillator signal along the length of the transmission line, when a supply voltage is applied to at least one end of the transmission line. The location of each gain stage is non-coincidental with an expected location of maximum amplitude of the standing wave oscillator signal.

Present invention relate to a wideband signal source. The wideband signal source comprises a voltage controlled oscillator (VCO), a first buffer and a programmable frequency extender. The VCO outputs a signal with at least N:1 frequency tuning ratio, with N being an integer or a non-integer number larger than 1. The frequency extender receives the signal via the buffer to generate a final output, which has a wider frequency band than the signal. The buffer isolates the final output from interfering VCO for VCO operation stability. The frequency extender comprises at least a 1/N frequency divider, which matches the N:1 frequency tuning ratio of the signal, such that the final output has a gapless frequency band wider than the VCO output signal.

A resonant circuit to be connected to a negative resistance unit is disclosed. The resonant circuit includes a pair of resonant transmission lines electrically coupled to each other and a coupling transmission line connecting the resonant transmission lines. The resonant transmission lines and the coupling transmission line are formed on a semiconductor substrate. The resonant transmission lines have a length corresponding to a quarter wavelength (/4) of twice of the resonant frequency attributed to the resonant circuit.

Apparatus and methods for rotary traveling wave oscillators (RTWOs) are provided herein. In certain configurations, an RTWO includes a differential transmission line connected in a ring and a plurality of segments distributed around the ring. The segments include metal stubs extending from the RTWO's differential transmission line. The metal stubs aid in providing access to additional layout resources for tuning capacitors and other circuitry of the RTWO's segments, while permitting the length of RTWO's ring to be relative short. Thus, the metal stubs do not inhibit the RTWO from operating with relatively high oscillation frequency, while providing connectivity to tuning capacitors that tune the RTWO's oscillation frequency over a wide tuning range and/or provide fine frequency step size.

A multi-order wave voltage controlled oscillator (VCO) includes a power impedance matching unit, a signal transmitting unit, a harmonic wave eliminating unit and an oscillation frequency adjusting unit. The power impedance matching unit includes an input end, an output end and a first transmission line between the input end and the output end. The first transmission line is a -wavelength transmission line based on a wavelength of an output harmonic wave. The signal transmitting unit includes multiple upper inductor electrically connected to the output end and multiple lower inductors electrically connected to a ground end. The harmonic wave eliminating unit includes multiple transistors electrically connected to the signal transmitting unit and each having a drain electrically connected to a gate of the adjacent transistor to form a multi-order ring loop. The oscillation frequency adjusting unit includes multiple varactors.

Apparatus and methods for rotary traveling wave oscillators (RTWOs) are provided herein. In certain configurations, an RTWO includes a differential transmission line connected in a ring and a plurality of segments distributed around the ring. The segments include metal stubs extending from the RTWO's differential transmission line. The metal stubs aid in providing access to additional layout resources for tuning capacitors and other circuitry of the RTWO's segments, while permitting the length of RTWO's ring to be relative short. Thus, the metal stubs do not inhibit the RTWO from operating with relatively high oscillation frequency, while providing connectivity to tuning capacitors that tune the RTWO's oscillation frequency over a wide tuning range and/or provide fine frequency step size.